Question

大家好我有一个项目，我需要使用mysql中的join同时删除4个表这是我的疑问：

DELETE product_tbl, product_rebate, product_terms, product_cashp, product_downpayment 
FROM product_tbl INNER JOIN product_rebate ON product_tbl.Prod_ID = product_rebate.Prod_ID 
 INNER JOIN product_terms ON product_tbl.Prod_ID = product_terms.Prod_ID 
 INNER JOIN product_cashp ON product_tbl.Prod_ID = product_tbl.Prod_ID;

它不起作用它给了我一个错误：＃1109 - MULTI DELETE中的未知表'product_tbl'

Answer 1

MySQL使用INNER JOIN DELETE JOIN

DELETE T1, T2
FROM T1
INNER JOIN T2 ON T1.key = T2.key
WHERE condition

试试这个： -

DELETE product_tbl, product_rebate, product_terms, product_cashp, 
       product_downpayment
FROM   product_tbl
       INNER JOIN product_rebate
            ON  product_tbl.Prod_ID = product_rebate.Prod_ID
       INNER JOIN product_terms
            ON  product_tbl.Prod_ID = product_terms.Prod_ID
       INNER JOIN product_cashp
            ON  product_tbl.Prod_ID = product_cashp.Prod_ID;

Answer 2

试试这个，

DELETE product_tbl, product_rebate, product_terms, product_cashp, 
       product_downpayment
FROM   product_tbl
       INNER JOIN product_rebate
            ON  product_tbl.Prod_ID = product_rebate.Prod_ID
       INNER JOIN product_terms
            ON  product_tbl.Prod_ID = product_terms.Prod_ID
       INNER JOIN product_cashp
            ON  product_tbl.Prod_ID = product_cashp.Prod_ID;

我认为你在最后一次内部联接中犯了错误，

  INNER JOIN product_cashp
            ON  product_tbl.Prod_ID = product_tbl.Prod_ID; -- both side same table?

使用mysql中的join删除2个或更多表

2 个答案: